<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Document</title>
</head>
<body>
	<canvas width="500" height="500" id="hehe">
		
	</canvas>
</body>
<script type="text/javascript">
//	var canvas = document.getElementById("hehe");
//	var context = canvas.getContext("2d");
//	
//	var img = new Image;
//	img.src = "img/background.png";
//	img.onload = function(){
//		context.beginPath();
//		context.drawImage(img,0,0,canvas.width,canvas.height+20);
//	context.save();
//	}
	
	
</script>
</html>